Industrial truck



Aug 2, 1932.

E. H. REMDE INDUSTRIAL TRUCK Filed Nov. 26, 1928 5 Sheets-Sheet lINVENTOR ATTORNEY Aug. 2, 1932. E. H. REMDE INDUSTRIAL TRUCK Filed Nov.1928 5 Sheets-Sheet 2 ATTDRNEY Aug. 2, 1932. E. H. REMDE 1,870,057

INDUSTRIAL TRUCK Filed Nov. 26, 1928 5 Sheets-Sheet 5 INVENTOR ATTORNEYAug. 2, 1932. E. H. REMDE INDUSTRIAL TRUCK 5 Sheets-Shet 5 Filed N2v 261928 .v {AA/Mia ATTORNEY Fatented Aug. 2, 1932 UNITED STATES PATENTOFFICE EDWARD H. REMDE, F CLEVELAND, OHIO, ASSIGNOR TO THE BAKEB-RAULANGOOH- PANY, OF CLEVELAND, OHIO, .A CORPORATION OF OHIO INDUSTRIAL metaApplication filed November 26, 1928. Serial No. 321,963.

' by loads may be elevated to relatively high positions or removed andlowered therefrom in a rapid and ready manner.

Another object of the invention is to provide a truck having an improvedelevating mechanism capable of lifting loads to relatively highpositions or removed and lowered therefrom without increasing the normalor standard height of the truck.

A further object of the invention is to 23 construct a truck of thischaracter having an improved elevating mechanism comprising a pluralityof relatively movable members. the inner one being mounted on the Otruck frame and the outer one serving to a) carry the load, and thehoisting means for such mechanism being operatively connected to saidmembers to effect their movement one relative to the other, whereby theouter or load carrying member is caused to traverse a the maximumdistance, that is, from the lowest loading or unloading position to thehighest loading or unloading position for which the mechanism isconstructed, the result being that loads may be lifted to or loweredfrom great heights in a ready manner and by means of a relatively simplemechanism without increasing the normal height of the truck.

Other objects of the invention will be apparent to those skilled in theart to which my invention relates from the following description takenin connection with the accompanying drawings, wherein Fig. 1 is a sideview of an industrial truck embodying my invention.

Fig. 2 is a fragmentary side view of parts shown in Fig. 1, but somewhatenlarged.

Fig. 3 is a section on the line 33 of Fig. 2.

Fig. 4 is a section on the line 4.4 of Fig. 3.

constructed to provide a main section 1a and v a relatively low section15. In this arrangement, the wheels 2 serve as traction wheels driven byan electric motor (not shown), which is supplied with electric currentfrom suitable batteries 4, and the wheels 3, which are relatively small,may serve as load supporting wheels. The wheels 3 are supported on theouter ends of an axle 5, the latter being supported intermediate itsends by the frame subsection 1?), as shown in Figs. 3 and 6, wherebyample room is'provided when and in the event it is found desirable tomount the wheels 3 on the axle 5 (as by means of knuckles) for swingingor steering movement. In this latter arrangement, the wheels 3 will beconnected with the steering gear for the wheels 2. 6 indicates platesdepending from the main frame section 1a and carrying outwardlyextending brackets 7. 8 indicates a platform pivotally mounted on thebrackets 7 and adapted to support. the operative.

9 indicates a foot pedal connected with the usual brake mechanism forthe truck, preferably normally acted upon by a spring (not shown) tobias its braking elements, such as shoes, against a brake wheel drivenby the traction motor, the pedal 9 serving as the operating device torelease the brake when pushed downwardly from the position shown indotted lines in Fig. 1. 10 indicates a guard or shield for the operativefixed to the frame section 111 and extending around the platform 8. Y

The batteries 4 which are mounted on the frame section 1a are preferablyenclosed in a sheet metal-casing 4a, of which one. or more sides areremovable.

11 indicates a pair of uprights (only one being shown in Fig. 1) mountedon the frame section 1 a adjacent its outer end and'rigidly supporting acasing 12 which forms a support for an electric motor 13; the purpose ofthe motor 13 will later appear. 14: indicates a suitable controllerconnected by a linkage 15 with an operating lever or device 16. 17indicates the device, such as a lever, operating through a column 18 andconnectlons 19 to steer the wheels 2.

one eing relatively stationary, so that the outermost one will move adistance substantially equal to the length of all the members less thelength of the outermost member and the overlap between the remainingmembers.

In the illustrated construction embod 'ng the principle of my inventionI provide t reemembers 21, 22, 23, the innermost one (21) beingrelatively stationary and preferably fixedly mounted on the sub-section1b and the outermost one ('23) servin as the load carrying member; aswill be un erstood, the member 23 is movable substantially from endtoend of the member 22 and the latter is movable substantially from endto end of the member 21. As a result, the operation of the power meanswill efiect a compound movement of the load carrying member 23 from theframe sections 1a, 16, together.

the position shown in full lines in Fig. 1 to the position shown indotted lines therein.

The member 21 may comprise a pair of spaced I-beams serving as guidesfor the intermediate member 22.-

The lower ends of the I-beams 21 are connected at their lower ends tothe frame members 1b and also braced by the extended portions 10 of theside plates 101 which conr iect he beams 21 are connected at their upperends by a cross member 24 and a rod 24a; the upper ends of the beams arebraced by tie members 25 connected to the uprights 11. The rod 24aserves as a shaft for a plurality of sheaves 24b, 24b, to whichreference will later be made. The intermediate member comprises a pairof I-beams connected in spaced relation at their upper ends by a crossplate 26a and a rod 26 mounted in hollow bosses or hangers 27. The rod26 serves as a shaft for sheaves 28, the purpose of which will laterappear. 29 indicates a plate riveted or otherwise secured to each I-beam22 and extending inwardly beyond but on the outer side of the adjacentI-beam 21 and an ported in spaced relation to the adjacent p ate 29.Spacing sleeves are positioned on the rods 30, 30, between the plates 32and between each plate 32 and the adjacent plate 29 so that when thenuts 34 on the ends of the rods are tightened against the plates 29, thelatter plates and plates 32 are mounted in fixed, spaced relation. Theinner free ends of the lates 32 are held against inward movement ycotter pins 32a. 35 indicates flanged rollers loosely mounted on the rod31, one thereof between each pair of plates 29, 32, and engaging theinner flange of the adjacent I- beam 21. 36 indicates stud shaftsextending inwardly from the lower portions of the plates 29 andsupporting flanged rollers 37, each engaging the outer flange of one ofthe I-beams 21. s will be understood the rollers 35, 37, co-operate tomovably support the intermediate member 22 on the inner member 21,whereby the member 22 ma traverse the member 21 upon operation 0 thehoisting means to be later described, from the position shown in fulllines in Fig. 1 to the position shown in dotted lines therein.

38 indicates a shaft extending between and supported in any desiredmanner at its opposite ends by the plates 32. 39 indicates sheavesloosely mounted on the shaft 38 for a purpose to be later set forth.

The outer or load carrying member 23 comprises a pair of plates 40disposed on the outer sides of the I-beams 22and connected in spacedrelation by rods'41, 41, 42, and a pair of plates 43 disposed on theinner sides of the I-beams and in close relation thereto respectively.The plates 43 are preferably spaced from each other by sleeves on therods 41, 41; and each plate 43 and the adjacent plate 40 are spaced bythe upright sections of L-devices 45, the horizontal sections of whichare arranged to be projected below a load to lift it and hold it whilebeing elevated, lowered or transported; these parts being rigidlyconnected by the tightening of nuts 46 on the outer ends of the rods 41,41. The inner end of each plate 43 is spaced from the adjacent plate 40by a sleeve which surrounds the adjacent rod 42 and forms a bushing fora flanged roller 47. The rollers 47 have rolling engagement with theinner flanged sides of the beams 22 and co-operate with flanged rollers48 engaging the outer flanged sides of the beams 22 to movably supportthe member 23 thereon. The rollers 48 are preferably mounted on shafts49 one thereof being supported by each plate 40 and the adjacent plate43. The load engaging element of the loadcarrying member 23 may beconstructed in any desired manner dependingupon the character of theloads to be handled. The L-devices are shown to illustrate one suitableform of construction. In this form I oad engaging or horizontal sectionsa plate The hoisting mechanism comprises the motor 13 (already referredto), transmitting its power through a suitable driving mechanism ousedin ,a portion of the casting 12to a drum 50, fora flexible hoistingmember51, which winds'on and off the drum. I referably provide two.drums 50 and two exible members, such as wire cables. The flexiblemembers maybe connected with all of the relatively movable members 21,22, 23, inseries and by the proper arrangement of suitable r'eevingdevices or sheaves thereoneffect their relative movement and therebycause the outer member 23 to move to the extreme lowerposition andextreme upper position as already described. However, to .provide foradequate lifting power and long travel of the load carrying member dueto the compounding of the elevating mechanism I prefer to operativelyconnect the flexible members 51 with the intermediate member 22 to raiseand lower it relative to the relatively stationary member 21 and toprovide preferably two thereof, connected at their inner ends to theframe 1 and running over the-sheaves 28 and connected at their outerends to the load carrying member 23,- so that the movement of the member22 in either direction will cause the member 23 to move twice as fast asor double the distance moved during any period of time relative to thefloor or other fixed point, by the member 22. In the arrangementabovedescribed, the movement of 'the outer member 23 is proportional toand dependent upon the movement of the inter mediate member 22. As themembers 21 and 22 are of the same height and the member 23 52 to theslack take-up mechanism 53; The

inner ends in a suitable manner to lugs 54 provided on plates.55securedto the outer sides of frame bars or'members 1?). Fromthese lugsthe flexible members extend to and around the sheaves 28, their outerends depending from thesesheaves and being'connected to plates 56mounted on the inner faces ofthe plates' 1 3. 4 The motor 13 receivescurrent from the batteries 4, thecircuit for the motor to drive it ineither direction being controlled by a controller .58. A switchmechanism 59 having pairs of switch contacts is interposed in the motorcircuit so that in operating the elevating mechanism 20 in eitherdirection the circuit through one of the airs of switches will be openedwhen onepf t e movable members of such mechanism approaches its limit*of movement. To operate such mechanism I preferably provide two' rods60 slidable at their lower ends in openings formed in brackets 61 (see Fig. 3) carried by the top plate- 61a; the upper ends of the rods arepivoted .-to an equalizing bar 62,'which in turn is connected by a link63 to one :arm of a bell crank 64 loosely mounted on the shaft 240. Theother arm of the bell crank is connected by a link 65 to an arm 67 whichis fixed to the operating element for 'the switch mechanism. Each rod 60carries adjustable tappets 68 near its upper and lower ends and one ofthese is engaged and moved by 'a lateral element 69 carried by the l ods30, 30, as the member 22 moves upwardly or downwardly, such movementbeing transmitted through the linkage to the arm 67' to effect openingof the motor circuit and stopping pf the motor 13. When the rods 60 aremoved downward- 1y by the engagement of the element 69 with is at thelower end of the member 22 when the lower tappets, the latter compressescoiled the latter is in its lower position, as shown in Fig. 1, it willbe seen that movement of the member 22 relative to the member 21 willefiect a like relative movement of the member 23relative to the member22, or movement of the member 23 relative to the floortwice the distancemoved by the member 22. Accordingly, raising of the member 22 along itsguide 21, will move the member 23 to the extreme upper end of its guide22, as shown the adjacent sheaves 24b. 24b and 39 in a similar manner tothat as set forth with respect to the first mentioned flexible member,and its outer end is connected through the equalizer springs 70interposed between them and the brackets 1: accordingly when the member22 is again elevated the springs 70 return the rods 60 and linkage andthe switch mecha-' nism to neutral position. By the provision of collars71 on the rods 60 below the brackets 61 and springs 72 between thesecollars and brackets, the rods 60, linkage and switch mechanism arereturned to neutral position following the raising of the rods 60;andlowering of the member 22. 4

The slack take-up mechanism 53 comprises a weight 53' slidable betweenguides 53a, 53a, and having, lateral extensions engaging the lower edgesof the guides to limit upward movement of the weight 53'. If slackoccurs in the flexible members 51 for any reason, for

example, by reason of the member 22 engaging an obstruction in itsdescending movement, the weight will gravitate and hence take-up suchslack. By providing the weight 53' with arms 73 and interposing thesearms between the springs 72 and the brackets 60,

flexible members 51a are connected at their it will be seen that the weiht 53, when gravitating downwardly, w' act through the springs 72 andcollars 71 to move the rods 60 downwardly and effect an opening of themotor circuit.

' The load engaging sections may be disposed relatively close to orsubstantially in engagement with the floor when the members 22, 23, arelowered to their extreme low position as shown in Figs. 1 and 2.

It will be noted that when the movable members 22, 23, are in loweredposition neither one extends above the top of the member 21, but byreason of my improved construction the tiering or raising of loads toor'removing'them from positions above the mem ber 21 can be carried outin a ready and rapid manner. By arranging and connecting the flexiblehoisting members in the manner set forth the members 22, 23, are movedprogressively at a uniformly accelerated speed in either direction sothat the load carrying member 23 is ated and may e stopped at anydesired position between the ends of its travel. It will also be noted,particularly from Fig. 5, that the load engaging section is in full viewof the operative at all times. 3 I

To those skilled in the art to which my invention relates many changesin construction and widely differing embodiments and applications of myinvention will suggest themselves without departing from the spirit andscope thereof. My disclosures and the description herein are purelyillustrative and are not intended to be in any sense limiting.

What I claim is:

. 1. In a power driven truck, the combinetion of a wheel mountedframe,'a pair of s aced guides on said frame, a member mova ly mountedon said guides, said member comprising a pair of plates and verticallydisposed guides, said plates being connected in spaced relation anddisposed at the sides of said first mentioned guides and carryingrollers engaging therewith, each said plate extending forwardly beyondsaid first mentioned guides and carrying said last mentioned guides ontheir outer portions in a plane disposed parallel to said firstmentioned guides, a load carrying member movably mounted on said lastmentioned guides and comprising plates extending forwardly thereof andsupporting at their outer ends a load supportdisposed in front of thetruck frame and arranged to be lowered into close relation to the floor,and means for moving said movable member and said load carrying memberrelative to each other and said first mentioned guides/ 2. In a powerdriven truck, the combination of a wheel mounted frame, a pair of spacedguides on said frame, a member movably mounted on said guides, saidmember comprising a .pair of plates and vertically positively controlledand operdisposed guides, said lates being connected in spaced'relationand disposed at the sides of said first mentioned guides and carryingrollers engaging therewith, each said plate extending forwardly beyondsaid first mentioned guides and carrying said last mentioned uides ontheir outer portions in a plane tioned guides, a load carrying membermovbly mounted on said last mentioned guides an comprising platesextending forwardly thereof and supporting at their outer ends a loadsupport disposed in front of the truck frame and arranged to be loweredinto close relation to the fioor, a guide sheave at the upper ends ofsaid last mentioned guides, a flexible member connected at its inner enddirectly to said truck frame and running over said sheave and connectedat its outer end to said load carrying member, and means for moving saidfirst namedmovable member upwardly and downwardly.

3. In a power driven truck, the combination of a wheel mounted frame, apair of spaced guides on said frame, a member movably'mounted on saidguides, saidmember comprising a pair of plates and vertically disposedguides, said (plates being connected in spaced relation an disposed atthe sides of said first mentioned guides and carrying rollers engagingtherewith, each said plate isposed parallel to said first menextendingforwardly beyond said first men- I tioned guides and carryingsaid lastmentioned guides on their outer portions in a plane disposed arallel tosaid first mentioned guldes, a oad carrying member comprising plateshaving rollers engaging said last mentioned guidesextending forwardlythereof and supporting at their outer ends a load support disposed infront of the truck frame and arranged to be lowered into close relationto the floor, and means for moving said movable member and said loadcarrying member relative to each other and said first mentioned guides.

4. In a power driven truck, the combination of a wheel mounted frame, a'pair of spaced guides on said frame, a member movably mounted on saidguides, said member comprising a pair of plates and vertically disposedguides, said plates being connected in spaced relation and disposed atthe outer sides of said first mentioned guides and car rying rollers ontheir inner sides engaging therewith, each said plate extendingforwardly beyond said first mentioned guides and carryingsaid lastmentioned guides on their outer portions in a plane disposed parallel toand outwardly of said first mentioned guides,a load carrying membermovmentioned guides.

frame and arranged to be lowered into close relation to the floor, andmeans for moving said movable member and said load carrying memberrelative In testimony signed my name.

to each other and said first whereof, I v have hereunto EDWARD H. REMDE.

